I live in the Pacific North West with over 10ft tidal change, I draw 5' so theoretically anything that the chart lists being wet at mean low is navigable at high tide....theoretically. I grew up on the Chesapeake, 3' tidal change and if you ran aground it was sand or mud...up here it is rock so the idea of running aground is unnerving (ironically the only time I have run aground here was in the mouth of the Frazier river, sand) when I was in BC even though I knew the charts were in meters...I treated them as feet.
Joshua Slochum said "Anyone who says they have never run aground has never been anywhere (or is lieing)".